The curators of this exhibition, Julia Robinson and Christian Xatrec, explain in this video some of the keys to understand why 1961 was a decisive year that led to the invention of the “expansion of the arts”. The exhibition looks at the origins of the change, the experimental activity and the earliest collective actions that pointed to the beginning of an unprecedented expansion of the notion of “composition” and soon generated a multidisciplinary project that took place in real time/simultaneously over the course of that year.